1996-08-19 20:34:12 +00:00
|
|
|
/*
|
1998-09-15 19:36:32 +00:00
|
|
|
* Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
|
1996-08-19 20:34:12 +00:00
|
|
|
* The Regents of the University of California. All rights reserved.
|
|
|
|
*
|
|
|
|
* Redistribution and use in source and binary forms, with or without
|
|
|
|
* modification, are permitted provided that: (1) source code distributions
|
|
|
|
* retain the above copyright notice and this paragraph in its entirety, (2)
|
|
|
|
* distributions including binary code include the above copyright notice and
|
|
|
|
* this paragraph in its entirety in the documentation or other materials
|
|
|
|
* provided with the distribution, and (3) all advertising materials mentioning
|
|
|
|
* features or use of this software display the following acknowledgement:
|
|
|
|
* ``This product includes software developed by the University of California,
|
|
|
|
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
|
|
|
|
* the University nor the names of its contributors may be used to endorse
|
|
|
|
* or promote products derived from this software without specific prior
|
|
|
|
* written permission.
|
|
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
|
|
|
|
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
|
|
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
|
|
*/
|
|
|
|
|
|
|
|
#ifndef lint
|
1997-05-27 02:11:31 +00:00
|
|
|
static const char rcsid[] =
|
2001-07-23 23:15:13 +00:00
|
|
|
"@(#) $Header: /tcpdump/master/tcpdump/print-domain.c,v 1.64.2.1 2001/02/21 09:01:20 guy Exp $ (LBL)";
|
2000-01-30 00:45:58 +00:00
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
|
|
#include "config.h"
|
1996-08-19 20:34:12 +00:00
|
|
|
#endif
|
|
|
|
|
|
|
|
#include <sys/param.h>
|
|
|
|
#include <sys/time.h>
|
|
|
|
|
|
|
|
#include <netinet/in.h>
|
|
|
|
|
1998-09-15 19:36:32 +00:00
|
|
|
#ifdef NOERROR
|
1996-08-19 20:34:12 +00:00
|
|
|
#undef NOERROR /* Solaris sucks */
|
1998-09-15 19:36:32 +00:00
|
|
|
#endif
|
|
|
|
#ifdef NOERROR
|
1996-08-19 20:34:12 +00:00
|
|
|
#undef T_UNSPEC /* SINIX does too */
|
1998-09-15 19:36:32 +00:00
|
|
|
#endif
|
2001-04-03 07:45:48 +00:00
|
|
|
#include "nameser.h"
|
1996-08-19 20:34:12 +00:00
|
|
|
|
|
|
|
#include <stdio.h>
|
2000-01-30 00:45:58 +00:00
|
|
|
#include <string.h>
|
1996-08-19 20:34:12 +00:00
|
|
|
|
|
|
|
#include "interface.h"
|
|
|
|
#include "addrtoname.h"
|
|
|
|
#include "extract.h" /* must come after interface.h */
|
|
|
|
|
|
|
|
/* Compatibility */
|
|
|
|
#ifndef T_TXT
|
|
|
|
#define T_TXT 16 /* text strings */
|
|
|
|
#endif
|
|
|
|
#ifndef T_RP
|
|
|
|
#define T_RP 17 /* responsible person */
|
|
|
|
#endif
|
|
|
|
#ifndef T_AFSDB
|
|
|
|
#define T_AFSDB 18 /* AFS cell database */
|
|
|
|
#endif
|
|
|
|
#ifndef T_X25
|
|
|
|
#define T_X25 19 /* X_25 calling address */
|
|
|
|
#endif
|
|
|
|
#ifndef T_ISDN
|
|
|
|
#define T_ISDN 20 /* ISDN calling address */
|
|
|
|
#endif
|
|
|
|
#ifndef T_RT
|
|
|
|
#define T_RT 21 /* router */
|
|
|
|
#endif
|
|
|
|
#ifndef T_NSAP
|
|
|
|
#define T_NSAP 22 /* NSAP address */
|
|
|
|
#endif
|
|
|
|
#ifndef T_NSAP_PTR
|
|
|
|
#define T_NSAP_PTR 23 /* reverse NSAP lookup (deprecated) */
|
|
|
|
#endif
|
|
|
|
#ifndef T_SIG
|
|
|
|
#define T_SIG 24 /* security signature */
|
|
|
|
#endif
|
|
|
|
#ifndef T_KEY
|
|
|
|
#define T_KEY 25 /* security key */
|
|
|
|
#endif
|
|
|
|
#ifndef T_PX
|
|
|
|
#define T_PX 26 /* X.400 mail mapping */
|
|
|
|
#endif
|
|
|
|
#ifndef T_GPOS
|
|
|
|
#define T_GPOS 27 /* geographical position (withdrawn) */
|
|
|
|
#endif
|
|
|
|
#ifndef T_AAAA
|
|
|
|
#define T_AAAA 28 /* IP6 Address */
|
|
|
|
#endif
|
|
|
|
#ifndef T_LOC
|
|
|
|
#define T_LOC 29 /* Location Information */
|
|
|
|
#endif
|
2000-01-30 00:45:58 +00:00
|
|
|
#ifndef T_NXT
|
|
|
|
#define T_NXT 30 /* Next Valid Name in Zone */
|
|
|
|
#endif
|
|
|
|
#ifndef T_EID
|
|
|
|
#define T_EID 31 /* Endpoint identifier */
|
|
|
|
#endif
|
|
|
|
#ifndef T_NIMLOC
|
|
|
|
#define T_NIMLOC 32 /* Nimrod locator */
|
|
|
|
#endif
|
|
|
|
#ifndef T_SRV
|
|
|
|
#define T_SRV 33 /* Server selection */
|
|
|
|
#endif
|
|
|
|
#ifndef T_ATMA
|
|
|
|
#define T_ATMA 34 /* ATM Address */
|
|
|
|
#endif
|
|
|
|
#ifndef T_NAPTR
|
|
|
|
#define T_NAPTR 35 /* Naming Authority PoinTeR */
|
|
|
|
#endif
|
|
|
|
#ifndef T_A6
|
2001-04-03 07:45:48 +00:00
|
|
|
#define T_A6 38 /* IP6 address */
|
|
|
|
#endif
|
|
|
|
#ifndef T_DNAME
|
|
|
|
#define T_DNAME 39 /* non-terminal redirection */
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifndef T_OPT
|
|
|
|
#define T_OPT 41 /* EDNS0 option (meta-RR) */
|
2000-01-30 00:45:58 +00:00
|
|
|
#endif
|
1996-08-19 20:34:12 +00:00
|
|
|
|
|
|
|
#ifndef T_UNSPEC
|
|
|
|
#define T_UNSPEC 103 /* Unspecified format (binary data) */
|
|
|
|
#endif
|
|
|
|
#ifndef T_UNSPECA
|
|
|
|
#define T_UNSPECA 104 /* "unspecified ascii". Ugly MIT hack */
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifndef C_CHAOS
|
|
|
|
#define C_CHAOS 3 /* for chaos net (MIT) */
|
|
|
|
#endif
|
|
|
|
#ifndef C_HS
|
|
|
|
#define C_HS 4 /* for Hesiod name server (MIT) (XXX) */
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static char *ns_ops[] = {
|
|
|
|
"", " inv_q", " stat", " op3", " notify", " op5", " op6", " op7",
|
|
|
|
" op8", " updataA", " updateD", " updateDA",
|
|
|
|
" updateM", " updateMA", " zoneInit", " zoneRef",
|
|
|
|
};
|
|
|
|
|
|
|
|
static char *ns_resp[] = {
|
|
|
|
"", " FormErr", " ServFail", " NXDomain",
|
|
|
|
" NotImp", " Refused", " Resp6", " Resp7",
|
|
|
|
" Resp8", " Resp9", " Resp10", " Resp11",
|
|
|
|
" Resp12", " Resp13", " Resp14", " NoChange",
|
|
|
|
};
|
|
|
|
|
|
|
|
/* skip over a domain name */
|
|
|
|
static const u_char *
|
|
|
|
ns_nskip(register const u_char *cp, register const u_char *bp)
|
|
|
|
{
|
|
|
|
register u_char i;
|
|
|
|
|
|
|
|
if (((i = *cp++) & INDIR_MASK) == INDIR_MASK)
|
|
|
|
return (cp + 1);
|
2001-04-03 07:45:48 +00:00
|
|
|
if (cp >= snapend)
|
|
|
|
return(NULL);
|
1996-08-19 20:34:12 +00:00
|
|
|
while (i && cp < snapend) {
|
2001-04-03 07:45:48 +00:00
|
|
|
if ((i & INDIR_MASK) == EDNS0_MASK) {
|
|
|
|
int bitlen, bytelen;
|
|
|
|
|
|
|
|
if ((i & ~INDIR_MASK) != EDNS0_ELT_BITLABEL)
|
|
|
|
return(NULL); /* unknown ELT */
|
|
|
|
if ((bitlen = *cp++) == 0)
|
|
|
|
bitlen = 256;
|
|
|
|
bytelen = (bitlen + 7) / 8;
|
|
|
|
cp += bytelen;
|
|
|
|
} else
|
|
|
|
cp += i;
|
|
|
|
if (cp >= snapend)
|
|
|
|
return(NULL);
|
1996-08-19 20:34:12 +00:00
|
|
|
i = *cp++;
|
|
|
|
}
|
|
|
|
return (cp);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* print a <domain-name> */
|
|
|
|
static const u_char *
|
2001-04-03 07:45:48 +00:00
|
|
|
blabel_print(const u_char *cp)
|
|
|
|
{
|
|
|
|
int bitlen, slen, b;
|
|
|
|
int truncated = 0;
|
|
|
|
const u_char *bitp, *lim;
|
|
|
|
char tc;
|
|
|
|
|
|
|
|
if (cp >= snapend)
|
|
|
|
return(NULL);
|
|
|
|
if ((bitlen = *cp) == 0)
|
|
|
|
bitlen = 256;
|
|
|
|
slen = (bitlen + 3) / 4;
|
|
|
|
if ((lim = cp + 1 + slen) > snapend) {
|
|
|
|
truncated = 1;
|
|
|
|
lim = snapend;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* print the bit string as a hex string */
|
|
|
|
printf("\\[x");
|
|
|
|
for (bitp = cp + 1, b = bitlen; bitp < lim && b > 7; b -= 8, bitp++)
|
|
|
|
printf("%02x", *bitp);
|
|
|
|
if (bitp == lim)
|
|
|
|
printf("...");
|
|
|
|
else if (b > 4) {
|
|
|
|
tc = *bitp++;
|
|
|
|
printf("%02x", tc & (0xff << (8 - b)));
|
|
|
|
} else if (b > 0) {
|
|
|
|
tc = *bitp++;
|
|
|
|
printf("%1x", ((tc >> 4) & 0x0f) & (0x0f << (4 - b)));
|
|
|
|
}
|
|
|
|
printf("/%d]", bitlen);
|
|
|
|
|
|
|
|
return(truncated ? NULL : lim);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int
|
|
|
|
labellen(const u_char *cp)
|
1996-08-19 20:34:12 +00:00
|
|
|
{
|
|
|
|
register u_int i;
|
|
|
|
|
2001-04-03 07:45:48 +00:00
|
|
|
if (cp >= snapend)
|
|
|
|
return(-1);
|
|
|
|
i = *cp;
|
|
|
|
if ((i & INDIR_MASK) == EDNS0_MASK) {
|
|
|
|
int bitlen, elt;
|
|
|
|
|
|
|
|
if ((elt = (i & ~INDIR_MASK)) != EDNS0_ELT_BITLABEL)
|
|
|
|
return(-1);
|
|
|
|
if (cp + 1 >= snapend)
|
|
|
|
return(-1);
|
|
|
|
if ((bitlen = *(cp + 1)) == 0)
|
|
|
|
bitlen = 256;
|
|
|
|
return(((bitlen + 7) / 8) + 1);
|
1996-08-19 20:34:12 +00:00
|
|
|
} else
|
2001-04-03 07:45:48 +00:00
|
|
|
return(i);
|
|
|
|
}
|
|
|
|
|
|
|
|
static const u_char *
|
|
|
|
ns_nprint(register const u_char *cp, register const u_char *bp)
|
|
|
|
{
|
|
|
|
register u_int i, l;
|
|
|
|
register const u_char *rp = NULL;
|
|
|
|
register int compress = 0;
|
|
|
|
int chars_processed;
|
|
|
|
int elt;
|
|
|
|
int data_size = snapend - bp;
|
|
|
|
|
|
|
|
if ((l = labellen(cp)) < 0)
|
|
|
|
return(NULL);
|
|
|
|
if (cp >= snapend)
|
|
|
|
return(NULL);
|
|
|
|
chars_processed = 1;
|
|
|
|
if (((i = *cp++) & INDIR_MASK) != INDIR_MASK) {
|
1996-08-19 20:34:12 +00:00
|
|
|
compress = 0;
|
2001-04-03 07:45:48 +00:00
|
|
|
rp = cp + l;
|
|
|
|
}
|
|
|
|
|
1996-08-19 20:34:12 +00:00
|
|
|
if (i != 0)
|
|
|
|
while (i && cp < snapend) {
|
|
|
|
if ((i & INDIR_MASK) == INDIR_MASK) {
|
2001-04-03 07:45:48 +00:00
|
|
|
if (!compress) {
|
|
|
|
rp = cp + 1;
|
|
|
|
compress = 1;
|
|
|
|
}
|
1996-08-19 20:34:12 +00:00
|
|
|
cp = bp + (((i << 8) | *cp) & 0x3fff);
|
2001-04-03 07:45:48 +00:00
|
|
|
if (cp >= snapend)
|
|
|
|
return(NULL);
|
|
|
|
if ((l = labellen(cp)) < 0)
|
|
|
|
return(NULL);
|
1996-08-19 20:34:12 +00:00
|
|
|
i = *cp++;
|
2001-04-03 07:45:48 +00:00
|
|
|
chars_processed++;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If we've looked at every character in
|
|
|
|
* the message, this pointer will make
|
|
|
|
* us look at some character again,
|
|
|
|
* which means we're looping.
|
|
|
|
*/
|
|
|
|
if (chars_processed >= data_size) {
|
|
|
|
printf("<LOOP>");
|
|
|
|
return (NULL);
|
|
|
|
}
|
1996-08-19 20:34:12 +00:00
|
|
|
continue;
|
|
|
|
}
|
2001-04-03 07:45:48 +00:00
|
|
|
if ((i & INDIR_MASK) == EDNS0_MASK) {
|
|
|
|
elt = (i & ~INDIR_MASK);
|
|
|
|
switch(elt) {
|
|
|
|
case EDNS0_ELT_BITLABEL:
|
|
|
|
blabel_print(cp);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
/* unknown ELT */
|
|
|
|
printf("<ELT %d>", elt);
|
|
|
|
return(NULL);
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
if (fn_printn(cp, l, snapend))
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
cp += l;
|
|
|
|
chars_processed += l;
|
1996-08-19 20:34:12 +00:00
|
|
|
putchar('.');
|
2001-04-03 07:45:48 +00:00
|
|
|
if (cp >= snapend || (l = labellen(cp)) < 0)
|
|
|
|
return(NULL);
|
1996-08-19 20:34:12 +00:00
|
|
|
i = *cp++;
|
2001-04-03 07:45:48 +00:00
|
|
|
chars_processed++;
|
1996-08-19 20:34:12 +00:00
|
|
|
if (!compress)
|
2001-04-03 07:45:48 +00:00
|
|
|
rp += l + 1;
|
1996-08-19 20:34:12 +00:00
|
|
|
}
|
|
|
|
else
|
|
|
|
putchar('.');
|
|
|
|
return (rp);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* print a <character-string> */
|
|
|
|
static const u_char *
|
|
|
|
ns_cprint(register const u_char *cp, register const u_char *bp)
|
|
|
|
{
|
|
|
|
register u_int i;
|
|
|
|
|
2001-04-03 07:45:48 +00:00
|
|
|
if (cp >= snapend)
|
|
|
|
return NULL;
|
1996-08-19 20:34:12 +00:00
|
|
|
i = *cp++;
|
|
|
|
(void)fn_printn(cp, i, snapend);
|
|
|
|
return (cp + i);
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct tok type2str[] = {
|
|
|
|
{ T_A, "A" },
|
|
|
|
{ T_NS, "NS" },
|
|
|
|
{ T_MD, "MD" },
|
|
|
|
{ T_MF, "MF" },
|
|
|
|
{ T_CNAME, "CNAME" },
|
|
|
|
{ T_SOA, "SOA" },
|
|
|
|
{ T_MB, "MB" },
|
|
|
|
{ T_MG, "MG" },
|
|
|
|
{ T_MR, "MR" },
|
|
|
|
{ T_NULL, "NULL" },
|
|
|
|
{ T_WKS, "WKS" },
|
|
|
|
{ T_PTR, "PTR" },
|
|
|
|
{ T_HINFO, "HINFO" },
|
|
|
|
{ T_MINFO, "MINFO" },
|
|
|
|
{ T_MX, "MX" },
|
|
|
|
{ T_TXT, "TXT" },
|
|
|
|
{ T_RP, "RP" },
|
|
|
|
{ T_AFSDB, "AFSDB" },
|
|
|
|
{ T_X25, "X25" },
|
|
|
|
{ T_ISDN, "ISDN" },
|
|
|
|
{ T_RT, "RT" },
|
|
|
|
{ T_NSAP, "NSAP" },
|
|
|
|
{ T_NSAP_PTR, "NSAP_PTR" },
|
|
|
|
{ T_SIG, "SIG" },
|
|
|
|
{ T_KEY, "KEY" },
|
|
|
|
{ T_PX, "PX" },
|
|
|
|
{ T_GPOS, "GPOS" },
|
|
|
|
{ T_AAAA, "AAAA" },
|
2000-01-30 00:45:58 +00:00
|
|
|
{ T_LOC, "LOC " },
|
|
|
|
{ T_NXT, "NXT " },
|
|
|
|
{ T_EID, "EID " },
|
|
|
|
{ T_NIMLOC, "NIMLOC " },
|
|
|
|
{ T_SRV, "SRV " },
|
|
|
|
{ T_ATMA, "ATMA " },
|
|
|
|
{ T_NAPTR, "NAPTR " },
|
|
|
|
{ T_A6, "A6 " },
|
2001-04-03 07:45:48 +00:00
|
|
|
{ T_DNAME, "DNAME " },
|
|
|
|
{ T_OPT, "OPT " },
|
1996-08-19 20:34:12 +00:00
|
|
|
{ T_UINFO, "UINFO" },
|
|
|
|
{ T_UID, "UID" },
|
|
|
|
{ T_GID, "GID" },
|
|
|
|
{ T_UNSPEC, "UNSPEC" },
|
|
|
|
{ T_UNSPECA, "UNSPECA" },
|
|
|
|
{ T_AXFR, "AXFR" },
|
|
|
|
{ T_MAILB, "MAILB" },
|
|
|
|
{ T_MAILA, "MAILA" },
|
|
|
|
{ T_ANY, "ANY" },
|
|
|
|
{ 0, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct tok class2str[] = {
|
|
|
|
{ C_IN, "IN" }, /* Not used */
|
|
|
|
{ C_CHAOS, "CHAOS)" },
|
|
|
|
{ C_HS, "HS" },
|
|
|
|
{ C_ANY, "ANY" },
|
|
|
|
{ 0, NULL }
|
|
|
|
};
|
|
|
|
|
|
|
|
/* print a query */
|
2001-04-03 07:45:48 +00:00
|
|
|
static const u_char *
|
1996-08-19 20:34:12 +00:00
|
|
|
ns_qprint(register const u_char *cp, register const u_char *bp)
|
|
|
|
{
|
|
|
|
register const u_char *np = cp;
|
|
|
|
register u_int i;
|
|
|
|
|
|
|
|
cp = ns_nskip(cp, bp);
|
|
|
|
|
2001-04-03 07:45:48 +00:00
|
|
|
if (cp + 4 > snapend || cp == NULL)
|
|
|
|
return(NULL);
|
1996-08-19 20:34:12 +00:00
|
|
|
|
|
|
|
/* print the qtype and qclass (if it's not IN) */
|
|
|
|
i = *cp++ << 8;
|
|
|
|
i |= *cp++;
|
|
|
|
printf(" %s", tok2str(type2str, "Type%d", i));
|
|
|
|
i = *cp++ << 8;
|
|
|
|
i |= *cp++;
|
|
|
|
if (i != C_IN)
|
|
|
|
printf(" %s", tok2str(class2str, "(Class %d)", i));
|
|
|
|
|
|
|
|
fputs("? ", stdout);
|
2001-04-03 07:45:48 +00:00
|
|
|
cp = ns_nprint(np, bp);
|
|
|
|
return(cp ? cp + 4 : NULL);
|
1996-08-19 20:34:12 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* print a reply */
|
|
|
|
static const u_char *
|
|
|
|
ns_rprint(register const u_char *cp, register const u_char *bp)
|
|
|
|
{
|
2001-04-03 07:45:48 +00:00
|
|
|
register u_int class;
|
1996-08-19 20:34:12 +00:00
|
|
|
register u_short typ, len;
|
|
|
|
register const u_char *rp;
|
|
|
|
|
|
|
|
if (vflag) {
|
|
|
|
putchar(' ');
|
2001-04-03 07:45:48 +00:00
|
|
|
if ((cp = ns_nprint(cp, bp)) == NULL)
|
|
|
|
return NULL;
|
1996-08-19 20:34:12 +00:00
|
|
|
} else
|
|
|
|
cp = ns_nskip(cp, bp);
|
|
|
|
|
2001-04-03 07:45:48 +00:00
|
|
|
if (cp + 10 > snapend || cp == NULL)
|
1996-08-19 20:34:12 +00:00
|
|
|
return (snapend);
|
|
|
|
|
|
|
|
/* print the type/qtype and class (if it's not IN) */
|
|
|
|
typ = *cp++ << 8;
|
|
|
|
typ |= *cp++;
|
2001-04-03 07:45:48 +00:00
|
|
|
class = *cp++ << 8;
|
|
|
|
class |= *cp++;
|
|
|
|
if (class != C_IN && typ != T_OPT)
|
|
|
|
printf(" %s", tok2str(class2str, "(Class %d)", class));
|
1996-08-19 20:34:12 +00:00
|
|
|
|
|
|
|
/* ignore ttl */
|
|
|
|
cp += 4;
|
|
|
|
|
|
|
|
len = *cp++ << 8;
|
|
|
|
len |= *cp++;
|
|
|
|
|
|
|
|
rp = cp + len;
|
|
|
|
|
|
|
|
printf(" %s", tok2str(type2str, "Type%d", typ));
|
2001-04-03 07:45:48 +00:00
|
|
|
if (rp > snapend)
|
|
|
|
return(NULL);
|
1996-08-19 20:34:12 +00:00
|
|
|
|
2001-04-03 07:45:48 +00:00
|
|
|
switch (typ) {
|
1996-08-19 20:34:12 +00:00
|
|
|
case T_A:
|
2001-04-03 07:45:48 +00:00
|
|
|
if (cp + sizeof(struct in_addr) > snapend)
|
|
|
|
return(NULL);
|
1996-08-19 20:34:12 +00:00
|
|
|
printf(" %s", ipaddr_string(cp));
|
|
|
|
break;
|
|
|
|
|
|
|
|
case T_NS:
|
|
|
|
case T_CNAME:
|
|
|
|
case T_PTR:
|
2000-01-30 00:45:58 +00:00
|
|
|
#ifdef T_DNAME
|
2001-04-03 07:45:48 +00:00
|
|
|
case T_DNAME:
|
2000-01-30 00:45:58 +00:00
|
|
|
#endif
|
1996-08-19 20:34:12 +00:00
|
|
|
putchar(' ');
|
2001-04-03 07:45:48 +00:00
|
|
|
if (ns_nprint(cp, bp) == NULL)
|
|
|
|
return(NULL);
|
1996-08-19 20:34:12 +00:00
|
|
|
break;
|
|
|
|
|
2001-04-03 07:45:48 +00:00
|
|
|
case T_SOA:
|
|
|
|
if (!vflag)
|
|
|
|
break;
|
|
|
|
putchar(' ');
|
|
|
|
if ((cp = ns_nprint(cp, bp)) == NULL)
|
|
|
|
return(NULL);
|
|
|
|
putchar(' ');
|
|
|
|
if ((cp = ns_nprint(cp, bp)) == NULL)
|
|
|
|
return(NULL);
|
|
|
|
if (cp + 5 * 4 > snapend)
|
|
|
|
return(NULL);
|
|
|
|
printf(" %u", EXTRACT_32BITS(cp));
|
|
|
|
cp += 4;
|
|
|
|
printf(" %u", EXTRACT_32BITS(cp));
|
|
|
|
cp += 4;
|
|
|
|
printf(" %u", EXTRACT_32BITS(cp));
|
|
|
|
cp += 4;
|
|
|
|
printf(" %u", EXTRACT_32BITS(cp));
|
|
|
|
cp += 4;
|
|
|
|
printf(" %u", EXTRACT_32BITS(cp));
|
|
|
|
cp += 4;
|
|
|
|
break;
|
1996-08-19 20:34:12 +00:00
|
|
|
case T_MX:
|
|
|
|
putchar(' ');
|
2001-04-03 07:45:48 +00:00
|
|
|
if (cp + 2 > snapend)
|
|
|
|
return(NULL);
|
|
|
|
if (ns_nprint(cp + 2, bp) == NULL)
|
|
|
|
return(NULL);
|
1996-08-19 20:34:12 +00:00
|
|
|
printf(" %d", EXTRACT_16BITS(cp));
|
|
|
|
break;
|
|
|
|
|
|
|
|
case T_TXT:
|
|
|
|
putchar(' ');
|
|
|
|
(void)ns_cprint(cp, bp);
|
|
|
|
break;
|
|
|
|
|
2000-01-30 00:45:58 +00:00
|
|
|
#ifdef INET6
|
|
|
|
case T_AAAA:
|
2001-04-03 07:45:48 +00:00
|
|
|
if (cp + sizeof(struct in6_addr) > snapend)
|
|
|
|
return(NULL);
|
2000-01-30 00:45:58 +00:00
|
|
|
printf(" %s", ip6addr_string(cp));
|
|
|
|
break;
|
|
|
|
|
2001-04-03 07:45:48 +00:00
|
|
|
case T_A6:
|
2000-01-30 00:45:58 +00:00
|
|
|
{
|
|
|
|
struct in6_addr a;
|
2001-04-03 07:45:48 +00:00
|
|
|
int pbit, pbyte;
|
|
|
|
|
|
|
|
pbit = *cp;
|
|
|
|
pbyte = (pbit & ~7) / 8;
|
|
|
|
if (pbit > 128) {
|
|
|
|
printf(" %u(bad plen)", pbit);
|
|
|
|
break;
|
|
|
|
} else if (pbit < 128) {
|
|
|
|
memset(&a, 0, sizeof(a));
|
|
|
|
memcpy(&a.s6_addr[pbyte], cp + 1, sizeof(a) - pbyte);
|
|
|
|
printf(" %u %s", pbit, ip6addr_string(&a));
|
|
|
|
}
|
|
|
|
if (pbit > 0) {
|
|
|
|
putchar(' ');
|
|
|
|
if (ns_nprint(cp + 1 + sizeof(a) - pbyte, bp) == NULL)
|
|
|
|
return(NULL);
|
|
|
|
}
|
2000-01-30 00:45:58 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
#endif /*INET6*/
|
|
|
|
|
2001-04-03 07:45:48 +00:00
|
|
|
case T_OPT:
|
|
|
|
printf(" UDPsize=%u", class);
|
|
|
|
break;
|
|
|
|
|
1996-08-19 20:34:12 +00:00
|
|
|
case T_UNSPECA: /* One long string */
|
2001-04-03 07:45:48 +00:00
|
|
|
if (cp + len > snapend)
|
|
|
|
return(NULL);
|
|
|
|
fn_printn(cp, len, snapend);
|
1996-08-19 20:34:12 +00:00
|
|
|
break;
|
|
|
|
}
|
1997-05-27 02:11:31 +00:00
|
|
|
return (rp); /* XXX This isn't always right */
|
1996-08-19 20:34:12 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
ns_print(register const u_char *bp, u_int length)
|
|
|
|
{
|
|
|
|
register const HEADER *np;
|
|
|
|
register int qdcount, ancount, nscount, arcount;
|
2001-04-03 07:45:48 +00:00
|
|
|
register const u_char *cp = NULL;
|
1996-08-19 20:34:12 +00:00
|
|
|
|
|
|
|
np = (const HEADER *)bp;
|
2001-07-23 23:15:13 +00:00
|
|
|
TCHECK(*np);
|
1996-08-19 20:34:12 +00:00
|
|
|
/* get the byte-order right */
|
|
|
|
qdcount = ntohs(np->qdcount);
|
|
|
|
ancount = ntohs(np->ancount);
|
|
|
|
nscount = ntohs(np->nscount);
|
|
|
|
arcount = ntohs(np->arcount);
|
|
|
|
|
2001-04-03 07:45:48 +00:00
|
|
|
if (DNS_QR(np)) {
|
1996-08-19 20:34:12 +00:00
|
|
|
/* this is a response */
|
2001-04-03 07:45:48 +00:00
|
|
|
printf(" %d%s%s%s%s%s%s",
|
1996-08-19 20:34:12 +00:00
|
|
|
ntohs(np->id),
|
2001-04-03 07:45:48 +00:00
|
|
|
ns_ops[DNS_OPCODE(np)],
|
|
|
|
ns_resp[DNS_RCODE(np)],
|
|
|
|
DNS_AA(np)? "*" : "",
|
|
|
|
DNS_RA(np)? "" : "-",
|
|
|
|
DNS_TC(np)? "|" : "",
|
|
|
|
DNS_CD(np)? "%" : "");
|
|
|
|
|
1996-08-19 20:34:12 +00:00
|
|
|
if (qdcount != 1)
|
|
|
|
printf(" [%dq]", qdcount);
|
|
|
|
/* Print QUESTION section on -vv */
|
|
|
|
if (vflag > 1) {
|
2001-04-03 07:45:48 +00:00
|
|
|
fputs(" q:", stdout);
|
|
|
|
if ((cp = ns_qprint((const u_char *)(np + 1), bp))
|
|
|
|
== NULL)
|
|
|
|
goto trunc;
|
|
|
|
} else {
|
|
|
|
if ((cp = ns_nskip((const u_char *)(np + 1), bp))
|
|
|
|
== NULL)
|
|
|
|
goto trunc;
|
|
|
|
cp += 4;
|
|
|
|
}
|
1996-08-19 20:34:12 +00:00
|
|
|
printf(" %d/%d/%d", ancount, nscount, arcount);
|
|
|
|
if (ancount--) {
|
2001-04-03 07:45:48 +00:00
|
|
|
if ((cp = ns_rprint(cp, bp)) == NULL)
|
|
|
|
goto trunc;
|
1996-08-19 20:34:12 +00:00
|
|
|
while (ancount-- && cp < snapend) {
|
|
|
|
putchar(',');
|
2001-04-03 07:45:48 +00:00
|
|
|
if ((cp = ns_rprint(cp, bp)) == NULL)
|
|
|
|
goto trunc;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
/* Print NS and AR sections on -vv */
|
|
|
|
if (vflag > 1) {
|
|
|
|
if (nscount-- && cp < snapend) {
|
|
|
|
fputs(" ns:", stdout);
|
|
|
|
if ((cp = ns_rprint(cp, bp)) == NULL)
|
|
|
|
goto trunc;
|
|
|
|
while (nscount-- && cp < snapend) {
|
|
|
|
putchar(',');
|
|
|
|
if ((cp = ns_rprint(cp, bp)) == NULL)
|
|
|
|
goto trunc;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (arcount-- && cp < snapend) {
|
|
|
|
fputs(" ar:", stdout);
|
|
|
|
if ((cp = ns_rprint(cp, bp)) == NULL)
|
|
|
|
goto trunc;
|
|
|
|
while (arcount-- && cp < snapend) {
|
|
|
|
putchar(',');
|
|
|
|
if ((cp = ns_rprint(cp, bp)) == NULL)
|
|
|
|
goto trunc;
|
|
|
|
}
|
1996-08-19 20:34:12 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
/* this is a request */
|
2001-04-03 07:45:48 +00:00
|
|
|
printf(" %d%s%s%s", ntohs(np->id), ns_ops[DNS_OPCODE(np)],
|
|
|
|
DNS_RD(np) ? "+" : "",
|
|
|
|
DNS_AD(np) ? "$" : "");
|
1996-08-19 20:34:12 +00:00
|
|
|
|
|
|
|
/* any weirdness? */
|
2001-04-03 07:45:48 +00:00
|
|
|
if (*(((u_short *)np)+1) & htons(0x6cf))
|
1996-08-19 20:34:12 +00:00
|
|
|
printf(" [b2&3=0x%x]", ntohs(*(((u_short *)np)+1)));
|
|
|
|
|
2001-04-03 07:45:48 +00:00
|
|
|
if (DNS_OPCODE(np) == IQUERY) {
|
1996-08-19 20:34:12 +00:00
|
|
|
if (qdcount)
|
|
|
|
printf(" [%dq]", qdcount);
|
|
|
|
if (ancount != 1)
|
|
|
|
printf(" [%da]", ancount);
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
if (ancount)
|
|
|
|
printf(" [%da]", ancount);
|
|
|
|
if (qdcount != 1)
|
|
|
|
printf(" [%dq]", qdcount);
|
|
|
|
}
|
|
|
|
if (nscount)
|
|
|
|
printf(" [%dn]", nscount);
|
|
|
|
if (arcount)
|
|
|
|
printf(" [%dau]", arcount);
|
|
|
|
|
2001-04-03 07:45:48 +00:00
|
|
|
if (qdcount--) {
|
|
|
|
cp = ns_qprint((const u_char *)(np + 1),
|
|
|
|
(const u_char *)np);
|
|
|
|
if (!cp)
|
|
|
|
goto trunc;
|
|
|
|
if ((cp = ns_rprint(cp, bp)) == NULL)
|
|
|
|
goto trunc;
|
|
|
|
while (qdcount-- && cp < snapend) {
|
|
|
|
cp = ns_qprint((const u_char *)cp,
|
|
|
|
(const u_char *)np);
|
|
|
|
if (!cp)
|
|
|
|
goto trunc;
|
|
|
|
if ((cp = ns_rprint(cp, bp)) == NULL)
|
|
|
|
goto trunc;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Print remaining sections on -vv */
|
|
|
|
if (vflag > 1) {
|
|
|
|
if (ancount--) {
|
|
|
|
if ((cp = ns_rprint(cp, bp)) == NULL)
|
|
|
|
goto trunc;
|
|
|
|
while (ancount-- && cp < snapend) {
|
|
|
|
putchar(',');
|
|
|
|
if ((cp = ns_rprint(cp, bp)) == NULL)
|
|
|
|
goto trunc;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (nscount-- && cp < snapend) {
|
|
|
|
fputs(" ns:", stdout);
|
|
|
|
if ((cp = ns_rprint(cp, bp)) == NULL)
|
|
|
|
goto trunc;
|
|
|
|
while (nscount-- && cp < snapend) {
|
|
|
|
putchar(',');
|
|
|
|
if ((cp = ns_rprint(cp, bp)) == NULL)
|
|
|
|
goto trunc;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (arcount-- && cp < snapend) {
|
|
|
|
fputs(" ar:", stdout);
|
|
|
|
if ((cp = ns_rprint(cp, bp)) == NULL)
|
|
|
|
goto trunc;
|
|
|
|
while (arcount-- && cp < snapend) {
|
|
|
|
putchar(',');
|
|
|
|
if ((cp = ns_rprint(cp, bp)) == NULL)
|
|
|
|
goto trunc;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
1996-08-19 20:34:12 +00:00
|
|
|
}
|
|
|
|
printf(" (%d)", length);
|
2001-04-03 07:45:48 +00:00
|
|
|
return;
|
|
|
|
|
|
|
|
trunc:
|
|
|
|
printf("[|domain]");
|
|
|
|
return;
|
1996-08-19 20:34:12 +00:00
|
|
|
}
|